Which one of the following devices is used to measure atmospheric pres

Which one of the following devices is used to measure atmospheric pressure ?

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Ammeter

Barometer

Potentiometer

Lactometer

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This question was previously asked in

UPSC NDA-1 – 2018

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A barometer is the device specifically used to measure atmospheric pressure.

Atmospheric pressure is the pressure exerted by the weight of the air column above a point on Earth’s surface. Devices like mercury barometers (Torricelli’s principle) or aneroid barometers are designed to measure this pressure.

An ammeter measures electric current. A potentiometer measures electrical potential difference (voltage). A lactometer is a hydrometer used to test the purity or density of milk.

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